Machine for forming and polishing door-panels



(No Model.) 3 SheetsSheet 1.

D.-M.BOBBRTS.'

MACHINE FOR FORMING AND POLISHING DOORlA-NELS,

No 384,788. Patented June 19, 1888. 4

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MAGHI-NE FOR FORMING AND POLISHING DOOR PANELS; No. 384,788. Pqtented June 19, 1888.

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(No Model.) 3 Sheets-Sheet 3.

D. M. ROBERTS. MACHINE FOR FORMING AND POLISHING DOOR PANELS.

No. 884,788. Patented June 19, 1888.

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UNITED STATES PATENT OFFICE.

DAVID M. ROBERTS, OF CHICAGO, ILLINOIS.

MACHINE FOR FORMING AND POLISHING DOOR-PANELS.

SPECIFICATION forming part of Letters Patent No. 384,788, dated June 19, 1888.

Application filed January 16, 1888. Serial No. 260,800. (No model.)

To aZZ whom it may concern.-

Be it known that I, DAVID M. ROBERTS, of Chicago,Illinois,haveinventcdcertainnew and useful Improvements in Machines for Forming and Polishing Door-Panels, of which the following is a specification.

The object of the invention is to provide a machine which will plane the blank, cut down the margins, so as to leave the raised panel in the center, and polish or sandpaper the panel on one side all at a single operation or single passing of the blank through the ma Heretofore the blank was first planed, then paneled, then polished, each of these processes,when effected by machinery, requiring the blank to be passed through a separate machine.

The invention consists in the machine and the features thereof, which are hereinafter particularly described and claimed, and which are illustrated in the accompanying drawings, in which Figure 1 is a longitudinal vertical section taken on line 1 l of Fig. 3, looking in the direction indicated by the arrow. Fig. 2 is a transverse vertical section of the machine taken on line 2 2 of Fig. 3, looking in the di rection indicated by arrow 2. Fig. 3 is a plan or top view of the machine, omitting the fragment shown in transverse vertical section at the left of line m m of Fig. 2 and portions at the corners where the signatures are. Fig. 4 is a side elevation of all that part of the machine to the left of line y y of Fig. I, such as would be seen by looking at that side of the machine toward which the arrow 3 is pointed in Fig. 2. Fig. 5 is a side elevation of thesame part of the machine looked at from the opposite side. Fig. 6 is a detail showing a fragment of a detached part in plan View.

A designates the supporting-frame of the machine.

B is the bed of the machine. The bed is adapted in the ordinary manner to be raised and the object of having one of them, as D,

yielding is to make them automatically adapt themselves to blanks which vary slightly in Width. Thebedis also providedwithaspring,

D which is adapted to hold the blank over against the guide D when the blank is being fed into the machine and before it is caught by the feed rollers.

The machine is provided with feed and presser rollers EE, which are made adjustable by means of set-screws s or otherwise in the ordinary way and are also operated in the ordinary way by means of gears E E, engaging with a wheel on a shaft geared to the pulley-shaft E", provided with pulley E adapted to operate the feed and presser rollers independently of the cutter-shaft.

The machine is also'provided with a presserbar, F, of ordinary construction, with the exception that it has feet f, which are adapted to bear upon the lowered margins of the panels as the latter comes from the cutter-head.

The cutter-head shield G is pivoted to a rod, 9, so as to permit the front part to be raised and turned back from over the cutter-head,and the front part is provided with projections or short arms in which are set-screws e, the points of which rest on the boxing of the front feed-roller for the purpose of adjusting the height of the front edge, 0, Fig. 1, of said shield, so that it shall rest upon the tail end of the blank and hold it down after itis free from the front feed-rollers, the set-screw e being adapted to adjust the height of the shield edge independently of the adj nstment of said feedrollers. a

H is the cutter-head, which is extended at each end in the form of a shaft, h, and journaled in the frame of the machine in the ordinary manner.

To one end of shaft h is attached a supplemental shaft, h, (which, however, maybe an integral extension of the shaft 7a,) to which is attached a double-flanged pulley, I, upon the outermost of the flanges of which the main drive-belt for operating the cutter-head is applied. The cutter-head is provided with two planing-knives, a a, for planing the blank, and two paneling-knives, a, at each end for cutting and planing the lowered portion along the margin of the panel. The cutter-head is provided with longitudinal slots a upon two sides for the purpose of making the panelingknives adjustable to different widths of panels, the heads of the bolts e",which secure said paneling-knives to the cutter-head, being adapted to slide in the enlarged bottom of the slots,so as to set said knives at different distances apart, and for the purpose of more readily setting the machineto the regulation sizes ofpanelsthecutter-head is scaled or marked by hole 0 or otherwise to indicate the various points of adjustment corresponding with the regulation sizes of panels. Such setting of the panelingknives is most readily effected by moving only one of them, leaving the other stationary, and for this reason, I prefer to make the guide D adjustable in correspondence with the adjustment of the paneling-knife over its side of the bed with hole 0, corresponding in lateral position with the position of the scale marks or holes on the cutter-head. I prefer holes 0 0, because by placing a pin temporarily therein the paneling-knife or guide,when loosened, can be shoved over against the pin as a stop and then be tightened in the proper place. Slots 0 in the bed allow the bolts to move when the nuts (Z are loosened.

To therear of the cutter-head a bracketframe, A, is attached to the main frame A, and this bracket-frame is provided with a vertical sleeve or boxing, A, on each of its crossbeams adapted to support a vertical shaft, J, which is provided with a pulley, J, and has a sand-paper wheel, J attached at the bottom. Two inclined pulleys, K K, are arranged to carry a belt, it, from the inner flange of the double-flanged pulley I over the pulley J for operating the sand-paper wheel; and as the blank passes from the cutter-head it is caught by the presser-rollers at the rear there of and forced under the sand-paper wheel and thence under the last roller and out of the machine. The sand-paper wheel being rotated at a high speed and being in contact with the upper side of the panel as it is passing polishes it, so that the rough panel-blank fed in at one end of the machine comes out at the other planed, lowered at the side margins, and polished on one side. The sand-paper wheel is made adjustable vertically in order that it may be set closer to the work as the paper becomes dulled or worn by use. This adj ustability is secured by attaching the shaft J to pulley J, so as to slide through the same. The keyi being permanently seated in the box of said pulley and sliding in a groove in the shaft, permits the shaft to be raised and lowered without moving said pulley. The shaft is supported from the top, there being a ring, L, fixed to its top by a set-screw, and a loose ring, L, to which a clevis, M, is attached, so that by means of a lever, M, the shaft may be raised or lowered when desired. The lever is pivotally fixedlat m, (Fig. 2,) and a weight, m',is thus rested, through the lever, on the top of the shaft to hold the sand-paper wheel down to its work. The downward movement of the vertical shaft is limited by a set-screw, 42, adapted to strike the under side of the lever and stop the dropping of the sand-paper wheel below the proper limit, and when the sandpaper is dulled or worn by use it is lowered to compensate the wear by varying the setscrew.

A rotary brush, N, is arranged over the bed and adapted to be operated by a belt from pulley N on the shaft which operates the feed-rollers, passing to the pulley N on the shaft N of the brush for the purpose of freeing the panel of dust as it comes from under the sand-paper wheel. The two rollers E E above the bed of the machine are held down to their work by means of weights WV, connected through lever-and-link connections 10 w, so as to bear down the sliding boxes supporting the journals of these rollers. This mechanism and its connection with the rollers for this purpose is of ordinary construction and application, and it is therefore not deemed necessary to describe it in detail.

To the side of the machine is attached an adjustable bed-plate or table, 0, having a stop guide, 0. This bed-plate and guide are attached directly to the frame A of the machine by means of a bracket-support, O, which is preferably made integral with said plate and connected with the frame by means of the ordinary dovetail groove in the bracket and corresponding tongue on the frame, (not illustrated,) whereby the bracket may slide verti- ICO cally on the frame, and a set-screw P, passing through a projecting lug of the bracket and corresponding lug on the frame A, is adapted to raise and lower the same as desired. Over this adjustable bed-plate and attached to the projecting end of shaft h is a cutter-head, Q, of ordinary construction and provided with paneling-knives, the same as the paneling knives of the cutter-head H, adapted to cut the same marginal formation of panel as that out by the paneling-knives of said cutter-head H. By this added device the marginal formation at the ends of the panel is to be cut, and thus the machine is made complete in itself for doing all the work required in forming and finishing panels, as will more fully appear in the described mode of its operation, as given below.

In Fig. 2 the panel as passing through the machine is seen in cross-section at n.

The blanks, being pieces of board of the required length, width, and thickness to form a panel, are fed in, being laid flat on the bed and pushed forward by hand against the spring D, with one edge against the guide D, until caught between the first pair of feedrollers, the uppermost one of which is corrugated. These rollers draw it in and force it under the front edge, e, of the shield, and

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thence under the cutter-head H and the presser-bar F until it is caught by the second pair of rollers, which force it on under the sand-paper wheel and under the last roller and out of the machine, the succeeding blanks assisting in pushing forward those that precede the last presser-roller E at the rear of the machine,whose shaft 8 is journaled in the frame A,being operated by the panels as they are forced under said presser-roller and pushed along by those which follow. During this passage of the blanks they are first planed, and have the margins lowered by the planing and paneling knives of said cutter-head and then sandpapered on the upper side. After a lot of blanks have been thus run through the machine they are carried forward and run through again the other side up; but before commencing the second operation a thin strip of wood or metal, as seen at M, Fig. 2, corresponding in thickness and width to thelowcred margin of the paneLis placed on and secured to the bed of the machine under the panelingknives, so as to support the edge from below during the second cutting. This second operation completes the panel excepting the marginal formations at the ends thereof, and these portions are finished by passing them by hand under the cutter-hdad Q, the end being held against the guide 0 and the side held flat in the bed-plate O,tirst one side up and then the other. It is obvious that the machine with only the planing-knives and the sand-paper wheels can be used to advantage when it is de' sired to plane and polish a board without lowering themargins thereof, as is done in paneling.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The combination, with the bed B, of a cutter-head provided with planing-knives covering the whole surface of the blank and paneling-knives at each side covering the margins along opposite sides of the blank adapted to cut such margiuslower than the panel portion,

and a sand-paper wheel arranged over said bed at the rear of the cutter-head and adapted to operate on the blank as it passes from said cutter-head in a machine having feed-rollers and operating mechanism, shown and described.

2. The combination, with the bed 13, of th cutter-head H, provided with planingknives a a and paneling-knives a a, and the presserbar F, having a straight portion adapted to the surface covered by the planing-k nives,and aprojecting portion at each side of the straight portion adapted to the depressedmarginal surfaces covered by the panelingknives in armachine of the class mentioned provided with feed and operating mechanism, substantially as shown and described.

3. The combination, with the bed B and the bed O,the latter having guide 0, of the cutter head H, provided with planing-knives a a and paneling-knives a a, and the cutter-head Q on the same shaft and provided with panelingknives adapted to form the panel margin at the end of the panels in a machineof the class mentioned provided with mechanism, substantially as shown and described, for operating said cutter-heads simultaneously, as set forth.

'4. A machine for forming panels,consisting of a supportingframe and bed-plate, B, and supplemental bed 0, in combination with a rotary cuttcrhead, H, provided with planing and paneling knives, a rotary cutterhead, Q, on the same shaft provided with panelingknives, a sandpaper wheel arranged over the bed B at the rear of cutterhead H, and connected through pulleys K K and J by a belt running to a pulley on the shaft of said cutter-heads, said machine having feed-rollers and presscrbar, all arranged to operate substantially as and for the purpose specified.

DAVID M. ROBERTS.

Witnesses:

JNO. H. WHIPPLE, J AMES R. DEAN.

substantially as 

